Proton Mail for Business vs Kolab Now
Proton Mail for Business wins on privacy, Kolab Now wins on price and they tie on features. Every fact below was checked on or before 25 October 2026.
Which should you choose?
- Choose Proton Mail for Business if you want end-to-end encryption built in and more room (15 GB, against 5 GB).
- Choose Kolab Now if you want the lower price (CHF 5 a month) and freedom to use the mail app you already like.
| Feature | Proton Mail for Business | Kolab Now |
|---|---|---|
| Overall | 4.0 | 3.5 |
| Privacy | 4.5 | 3.0 |
| Price | 2.5 | 3.0 |
| Features | 4.5 | 4.5 |
| Cheapest plan | Mail Essentials $6.99 per user a month | Mailbox CHF 5 a month |
| Free plan | No | No |
| Storage | 15 GB | 5 GB |
| Your own domain | ✓ 3 | ✓ Yes |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | Switzerland |
| Your data is kept in | Switzerland | Switzerland |
| Founded | 2014 | 2013 |
| Free trial | 30-day refund | Unknown |
| Funded by advertising | No | No |
| Works in any mail app | With Proton Bridge on paid plans | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | ✓ Yes |
| Aliases | Yes | Yes |
| Open-source apps | ✓ Yes | ✓ Yes |
| Sign up without ID | No | No |
| White label | No | Unknown |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
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Where they differ
- On price: Proton Mail for Business Mail Essentials at $6.99 per user a month, against Kolab Now Mailbox at CHF 5 a month.
- Proton Mail for Business comes with 15 GB of storage and Kolab Now with 5 GB of storage.
- Proton Mail for Business encrypts mail end to end; Kolab Now doesn't encrypt mail end to end.
- Proton Mail for Business works in other mail apps through Proton Bridge on paid plans, and Kolab Now works in any mail app over IMAP.
Proton Mail for Business and Kolab Now: your questions
Which is more private, Proton Mail for Business or Kolab Now?
Proton Mail for Business scores 4.5 out of 5 for privacy and Kolab Now 3. Proton Mail for Business gives you end-to-end encryption built in.
Which is cheaper, Proton Mail for Business or Kolab Now?
Kolab Now is cheaper. Its Mailbox plan is CHF 5 a month, against $6.99 per user a month for Proton Mail for Business's Mail Essentials. Check the renewal price before you pay, as some first-year prices go up.
Do Proton Mail for Business and Kolab Now work with my own domain?
Yes, both do. Proton Mail for Business: 3 domains on its cheapest plan that allows one. Kolab Now: Yes.
Where do Proton Mail for Business and Kolab Now keep my email?
Both keep it in Switzerland.
Do Proton Mail for Business and Kolab Now work in other mail apps?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. Kolab Now works in any mail app over IMAP.
Prices and the latest news
Neither price has changed since my first check on 22 October 2026.
The latest headlines: Proton Mail for Business news · Kolab Now news.
Alternatives to Proton Mail for Business and Kolab Now
Proton Mail for Business vs mailbox.org · Kolab Now vs mailbox.org · Proton Mail for Business vs Posteo · Kolab Now vs Posteo · Proton Mail for Business vs Proton Mail · Kolab Now vs Proton Mail
How to switch
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.